To Pump Down The Msd - HP 5973 MSD Hardware Manual

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To pump down the MSD

Software changes
The software is revised periodically. If the steps in this procedure do not match your
MSD ChemStation software, refer to the manuals and online help supplied with the
software for more information.
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2 Select
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The rough pump will make a gurgling noise. This noise should stop within a minute.
If the noise continues, there is a large air leak in your system, probably at the
interface column nut, the vent valve, or the side plate seal.
Within 10 to 15 minutes the diffusion pump should be hot, or the turbo pump speed
up to 80%. The turbo pump speed should eventually reach 95%. If the MSD does
not pump down correctly, see the manual or online help for information on
troubleshooting air leaks and other vacuum problems.
5 The software will prompt you to turn on the GC/MSD interface heater and
GC oven. Click
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Diagnostics/Vacuum Control
Pump Down from the Vacuum menu.
when you have done so.
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from the View menu.

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